1 /*
2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Dave Airlie
25 * Alex Deucher
26 * Jerome Glisse
27 */
28
29 #include <linux/console.h>
30 #include <linux/efi.h>
31 #include <linux/pci.h>
32 #include <linux/pm_runtime.h>
33 #include <linux/slab.h>
34 #include <linux/vga_switcheroo.h>
35 #include <linux/vgaarb.h>
36
37 #include <drm/drm_cache.h>
38 #include <drm/drm_crtc_helper.h>
39 #include <drm/drm_device.h>
40 #include <drm/drm_file.h>
41 #include <drm/drm_framebuffer.h>
42 #include <drm/drm_probe_helper.h>
43 #include <drm/radeon_drm.h>
44
45 #include "radeon_device.h"
46 #include "radeon_reg.h"
47 #include "radeon.h"
48 #include "atom.h"
49
50 static const char radeon_family_name[][16] = {
51 "R100",
52 "RV100",
53 "RS100",
54 "RV200",
55 "RS200",
56 "R200",
57 "RV250",
58 "RS300",
59 "RV280",
60 "R300",
61 "R350",
62 "RV350",
63 "RV380",
64 "R420",
65 "R423",
66 "RV410",
67 "RS400",
68 "RS480",
69 "RS600",
70 "RS690",
71 "RS740",
72 "RV515",
73 "R520",
74 "RV530",
75 "RV560",
76 "RV570",
77 "R580",
78 "R600",
79 "RV610",
80 "RV630",
81 "RV670",
82 "RV620",
83 "RV635",
84 "RS780",
85 "RS880",
86 "RV770",
87 "RV730",
88 "RV710",
89 "RV740",
90 "CEDAR",
91 "REDWOOD",
92 "JUNIPER",
93 "CYPRESS",
94 "HEMLOCK",
95 "PALM",
96 "SUMO",
97 "SUMO2",
98 "BARTS",
99 "TURKS",
100 "CAICOS",
101 "CAYMAN",
102 "ARUBA",
103 "TAHITI",
104 "PITCAIRN",
105 "VERDE",
106 "OLAND",
107 "HAINAN",
108 "BONAIRE",
109 "KAVERI",
110 "KABINI",
111 "HAWAII",
112 "MULLINS",
113 "LAST",
114 };
115
116 #if defined(CONFIG_VGA_SWITCHEROO)
117 bool radeon_has_atpx_dgpu_power_cntl(void);
118 bool radeon_is_atpx_hybrid(void);
119 #else
radeon_has_atpx_dgpu_power_cntl(void)120 static inline bool radeon_has_atpx_dgpu_power_cntl(void) { return false; }
radeon_is_atpx_hybrid(void)121 static inline bool radeon_is_atpx_hybrid(void) { return false; }
122 #endif
123
124 #define RADEON_PX_QUIRK_DISABLE_PX (1 << 0)
125
126 struct radeon_px_quirk {
127 u32 chip_vendor;
128 u32 chip_device;
129 u32 subsys_vendor;
130 u32 subsys_device;
131 u32 px_quirk_flags;
132 };
133
134 static struct radeon_px_quirk radeon_px_quirk_list[] = {
135 /* Acer aspire 5560g (CPU: AMD A4-3305M; GPU: AMD Radeon HD 6480g + 7470m)
136 * https://bugzilla.kernel.org/show_bug.cgi?id=74551
137 */
138 { PCI_VENDOR_ID_ATI, 0x6760, 0x1025, 0x0672, RADEON_PX_QUIRK_DISABLE_PX },
139 /* Asus K73TA laptop with AMD A6-3400M APU and Radeon 6550 GPU
140 * https://bugzilla.kernel.org/show_bug.cgi?id=51381
141 */
142 { PCI_VENDOR_ID_ATI, 0x6741, 0x1043, 0x108c, RADEON_PX_QUIRK_DISABLE_PX },
143 /* Asus K53TK laptop with AMD A6-3420M APU and Radeon 7670m GPU
144 * https://bugzilla.kernel.org/show_bug.cgi?id=51381
145 */
146 { PCI_VENDOR_ID_ATI, 0x6840, 0x1043, 0x2122, RADEON_PX_QUIRK_DISABLE_PX },
147 /* Asus K53TK laptop with AMD A6-3420M APU and Radeon 7670m GPU
148 * https://bugs.freedesktop.org/show_bug.cgi?id=101491
149 */
150 { PCI_VENDOR_ID_ATI, 0x6741, 0x1043, 0x2122, RADEON_PX_QUIRK_DISABLE_PX },
151 /* Asus K73TK laptop with AMD A6-3420M APU and Radeon 7670m GPU
152 * https://bugzilla.kernel.org/show_bug.cgi?id=51381#c52
153 */
154 { PCI_VENDOR_ID_ATI, 0x6840, 0x1043, 0x2123, RADEON_PX_QUIRK_DISABLE_PX },
155 { 0, 0, 0, 0, 0 },
156 };
157
radeon_is_px(struct drm_device * dev)158 bool radeon_is_px(struct drm_device *dev)
159 {
160 struct radeon_device *rdev = dev->dev_private;
161
162 if (rdev->flags & RADEON_IS_PX)
163 return true;
164 return false;
165 }
166
radeon_device_handle_px_quirks(struct radeon_device * rdev)167 static void radeon_device_handle_px_quirks(struct radeon_device *rdev)
168 {
169 struct radeon_px_quirk *p = radeon_px_quirk_list;
170
171 /* Apply PX quirks */
172 while (p && p->chip_device != 0) {
173 if (rdev->pdev->vendor == p->chip_vendor &&
174 rdev->pdev->device == p->chip_device &&
175 rdev->pdev->subsystem_vendor == p->subsys_vendor &&
176 rdev->pdev->subsystem_device == p->subsys_device) {
177 rdev->px_quirk_flags = p->px_quirk_flags;
178 break;
179 }
180 ++p;
181 }
182
183 if (rdev->px_quirk_flags & RADEON_PX_QUIRK_DISABLE_PX)
184 rdev->flags &= ~RADEON_IS_PX;
185
186 /* disable PX is the system doesn't support dGPU power control or hybrid gfx */
187 if (!radeon_is_atpx_hybrid() &&
188 !radeon_has_atpx_dgpu_power_cntl())
189 rdev->flags &= ~RADEON_IS_PX;
190 }
191
192 /**
193 * radeon_program_register_sequence - program an array of registers.
194 *
195 * @rdev: radeon_device pointer
196 * @registers: pointer to the register array
197 * @array_size: size of the register array
198 *
199 * Programs an array or registers with and and or masks.
200 * This is a helper for setting golden registers.
201 */
radeon_program_register_sequence(struct radeon_device * rdev,const u32 * registers,const u32 array_size)202 void radeon_program_register_sequence(struct radeon_device *rdev,
203 const u32 *registers,
204 const u32 array_size)
205 {
206 u32 tmp, reg, and_mask, or_mask;
207 int i;
208
209 if (array_size % 3)
210 return;
211
212 for (i = 0; i < array_size; i +=3) {
213 reg = registers[i + 0];
214 and_mask = registers[i + 1];
215 or_mask = registers[i + 2];
216
217 if (and_mask == 0xffffffff) {
218 tmp = or_mask;
219 } else {
220 tmp = RREG32(reg);
221 tmp &= ~and_mask;
222 tmp |= or_mask;
223 }
224 WREG32(reg, tmp);
225 }
226 }
227
radeon_pci_config_reset(struct radeon_device * rdev)228 void radeon_pci_config_reset(struct radeon_device *rdev)
229 {
230 pci_write_config_dword(rdev->pdev, 0x7c, RADEON_ASIC_RESET_DATA);
231 }
232
233 /**
234 * radeon_surface_init - Clear GPU surface registers.
235 *
236 * @rdev: radeon_device pointer
237 *
238 * Clear GPU surface registers (r1xx-r5xx).
239 */
radeon_surface_init(struct radeon_device * rdev)240 void radeon_surface_init(struct radeon_device *rdev)
241 {
242 /* FIXME: check this out */
243 if (rdev->family < CHIP_R600) {
244 int i;
245
246 for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
247 if (rdev->surface_regs[i].bo)
248 radeon_bo_get_surface_reg(rdev->surface_regs[i].bo);
249 else
250 radeon_clear_surface_reg(rdev, i);
251 }
252 /* enable surfaces */
253 WREG32(RADEON_SURFACE_CNTL, 0);
254 }
255 }
256
257 /*
258 * GPU scratch registers helpers function.
259 */
260 /**
261 * radeon_scratch_init - Init scratch register driver information.
262 *
263 * @rdev: radeon_device pointer
264 *
265 * Init CP scratch register driver information (r1xx-r5xx)
266 */
radeon_scratch_init(struct radeon_device * rdev)267 void radeon_scratch_init(struct radeon_device *rdev)
268 {
269 int i;
270
271 /* FIXME: check this out */
272 if (rdev->family < CHIP_R300) {
273 rdev->scratch.num_reg = 5;
274 } else {
275 rdev->scratch.num_reg = 7;
276 }
277 rdev->scratch.reg_base = RADEON_SCRATCH_REG0;
278 for (i = 0; i < rdev->scratch.num_reg; i++) {
279 rdev->scratch.free[i] = true;
280 rdev->scratch.reg[i] = rdev->scratch.reg_base + (i * 4);
281 }
282 }
283
284 /**
285 * radeon_scratch_get - Allocate a scratch register
286 *
287 * @rdev: radeon_device pointer
288 * @reg: scratch register mmio offset
289 *
290 * Allocate a CP scratch register for use by the driver (all asics).
291 * Returns 0 on success or -EINVAL on failure.
292 */
radeon_scratch_get(struct radeon_device * rdev,uint32_t * reg)293 int radeon_scratch_get(struct radeon_device *rdev, uint32_t *reg)
294 {
295 int i;
296
297 for (i = 0; i < rdev->scratch.num_reg; i++) {
298 if (rdev->scratch.free[i]) {
299 rdev->scratch.free[i] = false;
300 *reg = rdev->scratch.reg[i];
301 return 0;
302 }
303 }
304 return -EINVAL;
305 }
306
307 /**
308 * radeon_scratch_free - Free a scratch register
309 *
310 * @rdev: radeon_device pointer
311 * @reg: scratch register mmio offset
312 *
313 * Free a CP scratch register allocated for use by the driver (all asics)
314 */
radeon_scratch_free(struct radeon_device * rdev,uint32_t reg)315 void radeon_scratch_free(struct radeon_device *rdev, uint32_t reg)
316 {
317 int i;
318
319 for (i = 0; i < rdev->scratch.num_reg; i++) {
320 if (rdev->scratch.reg[i] == reg) {
321 rdev->scratch.free[i] = true;
322 return;
323 }
324 }
325 }
326
327 /*
328 * GPU doorbell aperture helpers function.
329 */
330 /**
331 * radeon_doorbell_init - Init doorbell driver information.
332 *
333 * @rdev: radeon_device pointer
334 *
335 * Init doorbell driver information (CIK)
336 * Returns 0 on success, error on failure.
337 */
radeon_doorbell_init(struct radeon_device * rdev)338 static int radeon_doorbell_init(struct radeon_device *rdev)
339 {
340 /* doorbell bar mapping */
341 rdev->doorbell.base = pci_resource_start(rdev->pdev, 2);
342 rdev->doorbell.size = pci_resource_len(rdev->pdev, 2);
343
344 rdev->doorbell.num_doorbells = min_t(u32, rdev->doorbell.size / sizeof(u32), RADEON_MAX_DOORBELLS);
345 if (rdev->doorbell.num_doorbells == 0)
346 return -EINVAL;
347
348 rdev->doorbell.ptr = ioremap(rdev->doorbell.base, rdev->doorbell.num_doorbells * sizeof(u32));
349 if (rdev->doorbell.ptr == NULL) {
350 return -ENOMEM;
351 }
352 DRM_INFO("doorbell mmio base: 0x%08X\n", (uint32_t)rdev->doorbell.base);
353 DRM_INFO("doorbell mmio size: %u\n", (unsigned)rdev->doorbell.size);
354
355 memset(&rdev->doorbell.used, 0, sizeof(rdev->doorbell.used));
356
357 return 0;
358 }
359
360 /**
361 * radeon_doorbell_fini - Tear down doorbell driver information.
362 *
363 * @rdev: radeon_device pointer
364 *
365 * Tear down doorbell driver information (CIK)
366 */
radeon_doorbell_fini(struct radeon_device * rdev)367 static void radeon_doorbell_fini(struct radeon_device *rdev)
368 {
369 iounmap(rdev->doorbell.ptr);
370 rdev->doorbell.ptr = NULL;
371 }
372
373 /**
374 * radeon_doorbell_get - Allocate a doorbell entry
375 *
376 * @rdev: radeon_device pointer
377 * @doorbell: doorbell index
378 *
379 * Allocate a doorbell for use by the driver (all asics).
380 * Returns 0 on success or -EINVAL on failure.
381 */
radeon_doorbell_get(struct radeon_device * rdev,u32 * doorbell)382 int radeon_doorbell_get(struct radeon_device *rdev, u32 *doorbell)
383 {
384 unsigned long offset = find_first_zero_bit(rdev->doorbell.used, rdev->doorbell.num_doorbells);
385 if (offset < rdev->doorbell.num_doorbells) {
386 __set_bit(offset, rdev->doorbell.used);
387 *doorbell = offset;
388 return 0;
389 } else {
390 return -EINVAL;
391 }
392 }
393
394 /**
395 * radeon_doorbell_free - Free a doorbell entry
396 *
397 * @rdev: radeon_device pointer
398 * @doorbell: doorbell index
399 *
400 * Free a doorbell allocated for use by the driver (all asics)
401 */
radeon_doorbell_free(struct radeon_device * rdev,u32 doorbell)402 void radeon_doorbell_free(struct radeon_device *rdev, u32 doorbell)
403 {
404 if (doorbell < rdev->doorbell.num_doorbells)
405 __clear_bit(doorbell, rdev->doorbell.used);
406 }
407
408 /*
409 * radeon_wb_*()
410 * Writeback is the method by which the GPU updates special pages
411 * in memory with the status of certain GPU events (fences, ring pointers,
412 * etc.).
413 */
414
415 /**
416 * radeon_wb_disable - Disable Writeback
417 *
418 * @rdev: radeon_device pointer
419 *
420 * Disables Writeback (all asics). Used for suspend.
421 */
radeon_wb_disable(struct radeon_device * rdev)422 void radeon_wb_disable(struct radeon_device *rdev)
423 {
424 rdev->wb.enabled = false;
425 }
426
427 /**
428 * radeon_wb_fini - Disable Writeback and free memory
429 *
430 * @rdev: radeon_device pointer
431 *
432 * Disables Writeback and frees the Writeback memory (all asics).
433 * Used at driver shutdown.
434 */
radeon_wb_fini(struct radeon_device * rdev)435 void radeon_wb_fini(struct radeon_device *rdev)
436 {
437 radeon_wb_disable(rdev);
438 if (rdev->wb.wb_obj) {
439 if (!radeon_bo_reserve(rdev->wb.wb_obj, false)) {
440 radeon_bo_kunmap(rdev->wb.wb_obj);
441 radeon_bo_unpin(rdev->wb.wb_obj);
442 radeon_bo_unreserve(rdev->wb.wb_obj);
443 }
444 radeon_bo_unref(&rdev->wb.wb_obj);
445 rdev->wb.wb = NULL;
446 rdev->wb.wb_obj = NULL;
447 }
448 }
449
450 /**
451 * radeon_wb_init- Init Writeback driver info and allocate memory
452 *
453 * @rdev: radeon_device pointer
454 *
455 * Disables Writeback and frees the Writeback memory (all asics).
456 * Used at driver startup.
457 * Returns 0 on success or an -error on failure.
458 */
radeon_wb_init(struct radeon_device * rdev)459 int radeon_wb_init(struct radeon_device *rdev)
460 {
461 int r;
462
463 if (rdev->wb.wb_obj == NULL) {
464 r = radeon_bo_create(rdev, RADEON_GPU_PAGE_SIZE, PAGE_SIZE, true,
465 RADEON_GEM_DOMAIN_GTT, 0, NULL, NULL,
466 &rdev->wb.wb_obj);
467 if (r) {
468 dev_warn(rdev->dev, "(%d) create WB bo failed\n", r);
469 return r;
470 }
471 r = radeon_bo_reserve(rdev->wb.wb_obj, false);
472 if (unlikely(r != 0)) {
473 radeon_wb_fini(rdev);
474 return r;
475 }
476 r = radeon_bo_pin(rdev->wb.wb_obj, RADEON_GEM_DOMAIN_GTT,
477 &rdev->wb.gpu_addr);
478 if (r) {
479 radeon_bo_unreserve(rdev->wb.wb_obj);
480 dev_warn(rdev->dev, "(%d) pin WB bo failed\n", r);
481 radeon_wb_fini(rdev);
482 return r;
483 }
484 r = radeon_bo_kmap(rdev->wb.wb_obj, (void **)&rdev->wb.wb);
485 radeon_bo_unreserve(rdev->wb.wb_obj);
486 if (r) {
487 dev_warn(rdev->dev, "(%d) map WB bo failed\n", r);
488 radeon_wb_fini(rdev);
489 return r;
490 }
491 }
492
493 /* clear wb memory */
494 memset((char *)rdev->wb.wb, 0, RADEON_GPU_PAGE_SIZE);
495 /* disable event_write fences */
496 rdev->wb.use_event = false;
497 /* disabled via module param */
498 if (radeon_no_wb == 1) {
499 rdev->wb.enabled = false;
500 } else {
501 if (rdev->flags & RADEON_IS_AGP) {
502 /* often unreliable on AGP */
503 rdev->wb.enabled = false;
504 } else if (rdev->family < CHIP_R300) {
505 /* often unreliable on pre-r300 */
506 rdev->wb.enabled = false;
507 } else {
508 rdev->wb.enabled = true;
509 /* event_write fences are only available on r600+ */
510 if (rdev->family >= CHIP_R600) {
511 rdev->wb.use_event = true;
512 }
513 }
514 }
515 /* always use writeback/events on NI, APUs */
516 if (rdev->family >= CHIP_PALM) {
517 rdev->wb.enabled = true;
518 rdev->wb.use_event = true;
519 }
520
521 dev_info(rdev->dev, "WB %sabled\n", rdev->wb.enabled ? "en" : "dis");
522
523 return 0;
524 }
525
526 /**
527 * radeon_vram_location - try to find VRAM location
528 * @rdev: radeon device structure holding all necessary informations
529 * @mc: memory controller structure holding memory informations
530 * @base: base address at which to put VRAM
531 *
532 * Function will place try to place VRAM at base address provided
533 * as parameter (which is so far either PCI aperture address or
534 * for IGP TOM base address).
535 *
536 * If there is not enough space to fit the unvisible VRAM in the 32bits
537 * address space then we limit the VRAM size to the aperture.
538 *
539 * If we are using AGP and if the AGP aperture doesn't allow us to have
540 * room for all the VRAM than we restrict the VRAM to the PCI aperture
541 * size and print a warning.
542 *
543 * This function will never fails, worst case are limiting VRAM.
544 *
545 * Note: GTT start, end, size should be initialized before calling this
546 * function on AGP platform.
547 *
548 * Note 1: We don't explicitly enforce VRAM start to be aligned on VRAM size,
549 * this shouldn't be a problem as we are using the PCI aperture as a reference.
550 * Otherwise this would be needed for rv280, all r3xx, and all r4xx, but
551 * not IGP.
552 *
553 * Note 2: we use mc_vram_size as on some board we need to program the mc to
554 * cover the whole aperture even if VRAM size is inferior to aperture size
555 * Novell bug 204882 + along with lots of ubuntu ones
556 *
557 * Note 3: when limiting vram it's safe to overwritte real_vram_size because
558 * we are not in case where real_vram_size is inferior to mc_vram_size (ie
559 * note afected by bogus hw of Novell bug 204882 + along with lots of ubuntu
560 * ones)
561 *
562 * Note 4: IGP TOM addr should be the same as the aperture addr, we don't
563 * explicitly check for that thought.
564 *
565 * FIXME: when reducing VRAM size align new size on power of 2.
566 */
radeon_vram_location(struct radeon_device * rdev,struct radeon_mc * mc,u64 base)567 void radeon_vram_location(struct radeon_device *rdev, struct radeon_mc *mc, u64 base)
568 {
569 uint64_t limit = (uint64_t)radeon_vram_limit << 20;
570
571 mc->vram_start = base;
572 if (mc->mc_vram_size > (rdev->mc.mc_mask - base + 1)) {
573 dev_warn(rdev->dev, "limiting VRAM to PCI aperture size\n");
574 mc->real_vram_size = mc->aper_size;
575 mc->mc_vram_size = mc->aper_size;
576 }
577 mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
578 if (rdev->flags & RADEON_IS_AGP && mc->vram_end > mc->gtt_start && mc->vram_start <= mc->gtt_end) {
579 dev_warn(rdev->dev, "limiting VRAM to PCI aperture size\n");
580 mc->real_vram_size = mc->aper_size;
581 mc->mc_vram_size = mc->aper_size;
582 }
583 mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
584 if (limit && limit < mc->real_vram_size)
585 mc->real_vram_size = limit;
586 dev_info(rdev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
587 mc->mc_vram_size >> 20, mc->vram_start,
588 mc->vram_end, mc->real_vram_size >> 20);
589 }
590
591 /**
592 * radeon_gtt_location - try to find GTT location
593 * @rdev: radeon device structure holding all necessary informations
594 * @mc: memory controller structure holding memory informations
595 *
596 * Function will place try to place GTT before or after VRAM.
597 *
598 * If GTT size is bigger than space left then we ajust GTT size.
599 * Thus function will never fails.
600 *
601 * FIXME: when reducing GTT size align new size on power of 2.
602 */
radeon_gtt_location(struct radeon_device * rdev,struct radeon_mc * mc)603 void radeon_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
604 {
605 u64 size_af, size_bf;
606
607 size_af = ((rdev->mc.mc_mask - mc->vram_end) + mc->gtt_base_align) & ~mc->gtt_base_align;
608 size_bf = mc->vram_start & ~mc->gtt_base_align;
609 if (size_bf > size_af) {
610 if (mc->gtt_size > size_bf) {
611 dev_warn(rdev->dev, "limiting GTT\n");
612 mc->gtt_size = size_bf;
613 }
614 mc->gtt_start = (mc->vram_start & ~mc->gtt_base_align) - mc->gtt_size;
615 } else {
616 if (mc->gtt_size > size_af) {
617 dev_warn(rdev->dev, "limiting GTT\n");
618 mc->gtt_size = size_af;
619 }
620 mc->gtt_start = (mc->vram_end + 1 + mc->gtt_base_align) & ~mc->gtt_base_align;
621 }
622 mc->gtt_end = mc->gtt_start + mc->gtt_size - 1;
623 dev_info(rdev->dev, "GTT: %lluM 0x%016llX - 0x%016llX\n",
624 mc->gtt_size >> 20, mc->gtt_start, mc->gtt_end);
625 }
626
627 /*
628 * GPU helpers function.
629 */
630
631 /*
632 * radeon_device_is_virtual - check if we are running is a virtual environment
633 *
634 * Check if the asic has been passed through to a VM (all asics).
635 * Used at driver startup.
636 * Returns true if virtual or false if not.
637 */
radeon_device_is_virtual(void)638 bool radeon_device_is_virtual(void)
639 {
640 #ifdef CONFIG_X86
641 return boot_cpu_has(X86_FEATURE_HYPERVISOR);
642 #else
643 return false;
644 #endif
645 }
646
647 /**
648 * radeon_card_posted - check if the hw has already been initialized
649 *
650 * @rdev: radeon_device pointer
651 *
652 * Check if the asic has been initialized (all asics).
653 * Used at driver startup.
654 * Returns true if initialized or false if not.
655 */
radeon_card_posted(struct radeon_device * rdev)656 bool radeon_card_posted(struct radeon_device *rdev)
657 {
658 uint32_t reg;
659
660 /* for pass through, always force asic_init for CI */
661 if (rdev->family >= CHIP_BONAIRE &&
662 radeon_device_is_virtual())
663 return false;
664
665 /* required for EFI mode on macbook2,1 which uses an r5xx asic */
666 if (efi_enabled(EFI_BOOT) &&
667 (rdev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE) &&
668 (rdev->family < CHIP_R600))
669 return false;
670
671 if (ASIC_IS_NODCE(rdev))
672 goto check_memsize;
673
674 /* first check CRTCs */
675 if (ASIC_IS_DCE4(rdev)) {
676 reg = RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET) |
677 RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET);
678 if (rdev->num_crtc >= 4) {
679 reg |= RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC2_REGISTER_OFFSET) |
680 RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC3_REGISTER_OFFSET);
681 }
682 if (rdev->num_crtc >= 6) {
683 reg |= RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET) |
684 RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET);
685 }
686 if (reg & EVERGREEN_CRTC_MASTER_EN)
687 return true;
688 } else if (ASIC_IS_AVIVO(rdev)) {
689 reg = RREG32(AVIVO_D1CRTC_CONTROL) |
690 RREG32(AVIVO_D2CRTC_CONTROL);
691 if (reg & AVIVO_CRTC_EN) {
692 return true;
693 }
694 } else {
695 reg = RREG32(RADEON_CRTC_GEN_CNTL) |
696 RREG32(RADEON_CRTC2_GEN_CNTL);
697 if (reg & RADEON_CRTC_EN) {
698 return true;
699 }
700 }
701
702 check_memsize:
703 /* then check MEM_SIZE, in case the crtcs are off */
704 if (rdev->family >= CHIP_R600)
705 reg = RREG32(R600_CONFIG_MEMSIZE);
706 else
707 reg = RREG32(RADEON_CONFIG_MEMSIZE);
708
709 if (reg)
710 return true;
711
712 return false;
713
714 }
715
716 /**
717 * radeon_update_bandwidth_info - update display bandwidth params
718 *
719 * @rdev: radeon_device pointer
720 *
721 * Used when sclk/mclk are switched or display modes are set.
722 * params are used to calculate display watermarks (all asics)
723 */
radeon_update_bandwidth_info(struct radeon_device * rdev)724 void radeon_update_bandwidth_info(struct radeon_device *rdev)
725 {
726 fixed20_12 a;
727 u32 sclk = rdev->pm.current_sclk;
728 u32 mclk = rdev->pm.current_mclk;
729
730 /* sclk/mclk in Mhz */
731 a.full = dfixed_const(100);
732 rdev->pm.sclk.full = dfixed_const(sclk);
733 rdev->pm.sclk.full = dfixed_div(rdev->pm.sclk, a);
734 rdev->pm.mclk.full = dfixed_const(mclk);
735 rdev->pm.mclk.full = dfixed_div(rdev->pm.mclk, a);
736
737 if (rdev->flags & RADEON_IS_IGP) {
738 a.full = dfixed_const(16);
739 /* core_bandwidth = sclk(Mhz) * 16 */
740 rdev->pm.core_bandwidth.full = dfixed_div(rdev->pm.sclk, a);
741 }
742 }
743
744 /**
745 * radeon_boot_test_post_card - check and possibly initialize the hw
746 *
747 * @rdev: radeon_device pointer
748 *
749 * Check if the asic is initialized and if not, attempt to initialize
750 * it (all asics).
751 * Returns true if initialized or false if not.
752 */
radeon_boot_test_post_card(struct radeon_device * rdev)753 bool radeon_boot_test_post_card(struct radeon_device *rdev)
754 {
755 if (radeon_card_posted(rdev))
756 return true;
757
758 if (rdev->bios) {
759 DRM_INFO("GPU not posted. posting now...\n");
760 if (rdev->is_atom_bios)
761 atom_asic_init(rdev->mode_info.atom_context);
762 else
763 radeon_combios_asic_init(rdev->ddev);
764 return true;
765 } else {
766 dev_err(rdev->dev, "Card not posted and no BIOS - ignoring\n");
767 return false;
768 }
769 }
770
771 /**
772 * radeon_dummy_page_init - init dummy page used by the driver
773 *
774 * @rdev: radeon_device pointer
775 *
776 * Allocate the dummy page used by the driver (all asics).
777 * This dummy page is used by the driver as a filler for gart entries
778 * when pages are taken out of the GART
779 * Returns 0 on sucess, -ENOMEM on failure.
780 */
radeon_dummy_page_init(struct radeon_device * rdev)781 int radeon_dummy_page_init(struct radeon_device *rdev)
782 {
783 if (rdev->dummy_page.page)
784 return 0;
785 rdev->dummy_page.page = alloc_page(GFP_DMA32 | GFP_KERNEL | __GFP_ZERO);
786 if (rdev->dummy_page.page == NULL)
787 return -ENOMEM;
788 rdev->dummy_page.addr = dma_map_page(&rdev->pdev->dev, rdev->dummy_page.page,
789 0, PAGE_SIZE, DMA_BIDIRECTIONAL);
790 if (dma_mapping_error(&rdev->pdev->dev, rdev->dummy_page.addr)) {
791 dev_err(&rdev->pdev->dev, "Failed to DMA MAP the dummy page\n");
792 __free_page(rdev->dummy_page.page);
793 rdev->dummy_page.page = NULL;
794 return -ENOMEM;
795 }
796 rdev->dummy_page.entry = radeon_gart_get_page_entry(rdev->dummy_page.addr,
797 RADEON_GART_PAGE_DUMMY);
798 return 0;
799 }
800
801 /**
802 * radeon_dummy_page_fini - free dummy page used by the driver
803 *
804 * @rdev: radeon_device pointer
805 *
806 * Frees the dummy page used by the driver (all asics).
807 */
radeon_dummy_page_fini(struct radeon_device * rdev)808 void radeon_dummy_page_fini(struct radeon_device *rdev)
809 {
810 if (rdev->dummy_page.page == NULL)
811 return;
812 dma_unmap_page(&rdev->pdev->dev, rdev->dummy_page.addr, PAGE_SIZE,
813 DMA_BIDIRECTIONAL);
814 __free_page(rdev->dummy_page.page);
815 rdev->dummy_page.page = NULL;
816 }
817
818
819 /* ATOM accessor methods */
820 /*
821 * ATOM is an interpreted byte code stored in tables in the vbios. The
822 * driver registers callbacks to access registers and the interpreter
823 * in the driver parses the tables and executes then to program specific
824 * actions (set display modes, asic init, etc.). See radeon_atombios.c,
825 * atombios.h, and atom.c
826 */
827
828 /**
829 * cail_pll_read - read PLL register
830 *
831 * @info: atom card_info pointer
832 * @reg: PLL register offset
833 *
834 * Provides a PLL register accessor for the atom interpreter (r4xx+).
835 * Returns the value of the PLL register.
836 */
cail_pll_read(struct card_info * info,uint32_t reg)837 static uint32_t cail_pll_read(struct card_info *info, uint32_t reg)
838 {
839 struct radeon_device *rdev = info->dev->dev_private;
840 uint32_t r;
841
842 r = rdev->pll_rreg(rdev, reg);
843 return r;
844 }
845
846 /**
847 * cail_pll_write - write PLL register
848 *
849 * @info: atom card_info pointer
850 * @reg: PLL register offset
851 * @val: value to write to the pll register
852 *
853 * Provides a PLL register accessor for the atom interpreter (r4xx+).
854 */
cail_pll_write(struct card_info * info,uint32_t reg,uint32_t val)855 static void cail_pll_write(struct card_info *info, uint32_t reg, uint32_t val)
856 {
857 struct radeon_device *rdev = info->dev->dev_private;
858
859 rdev->pll_wreg(rdev, reg, val);
860 }
861
862 /**
863 * cail_mc_read - read MC (Memory Controller) register
864 *
865 * @info: atom card_info pointer
866 * @reg: MC register offset
867 *
868 * Provides an MC register accessor for the atom interpreter (r4xx+).
869 * Returns the value of the MC register.
870 */
cail_mc_read(struct card_info * info,uint32_t reg)871 static uint32_t cail_mc_read(struct card_info *info, uint32_t reg)
872 {
873 struct radeon_device *rdev = info->dev->dev_private;
874 uint32_t r;
875
876 r = rdev->mc_rreg(rdev, reg);
877 return r;
878 }
879
880 /**
881 * cail_mc_write - write MC (Memory Controller) register
882 *
883 * @info: atom card_info pointer
884 * @reg: MC register offset
885 * @val: value to write to the pll register
886 *
887 * Provides a MC register accessor for the atom interpreter (r4xx+).
888 */
cail_mc_write(struct card_info * info,uint32_t reg,uint32_t val)889 static void cail_mc_write(struct card_info *info, uint32_t reg, uint32_t val)
890 {
891 struct radeon_device *rdev = info->dev->dev_private;
892
893 rdev->mc_wreg(rdev, reg, val);
894 }
895
896 /**
897 * cail_reg_write - write MMIO register
898 *
899 * @info: atom card_info pointer
900 * @reg: MMIO register offset
901 * @val: value to write to the pll register
902 *
903 * Provides a MMIO register accessor for the atom interpreter (r4xx+).
904 */
cail_reg_write(struct card_info * info,uint32_t reg,uint32_t val)905 static void cail_reg_write(struct card_info *info, uint32_t reg, uint32_t val)
906 {
907 struct radeon_device *rdev = info->dev->dev_private;
908
909 WREG32(reg*4, val);
910 }
911
912 /**
913 * cail_reg_read - read MMIO register
914 *
915 * @info: atom card_info pointer
916 * @reg: MMIO register offset
917 *
918 * Provides an MMIO register accessor for the atom interpreter (r4xx+).
919 * Returns the value of the MMIO register.
920 */
cail_reg_read(struct card_info * info,uint32_t reg)921 static uint32_t cail_reg_read(struct card_info *info, uint32_t reg)
922 {
923 struct radeon_device *rdev = info->dev->dev_private;
924 uint32_t r;
925
926 r = RREG32(reg*4);
927 return r;
928 }
929
930 /**
931 * cail_ioreg_write - write IO register
932 *
933 * @info: atom card_info pointer
934 * @reg: IO register offset
935 * @val: value to write to the pll register
936 *
937 * Provides a IO register accessor for the atom interpreter (r4xx+).
938 */
cail_ioreg_write(struct card_info * info,uint32_t reg,uint32_t val)939 static void cail_ioreg_write(struct card_info *info, uint32_t reg, uint32_t val)
940 {
941 struct radeon_device *rdev = info->dev->dev_private;
942
943 WREG32_IO(reg*4, val);
944 }
945
946 /**
947 * cail_ioreg_read - read IO register
948 *
949 * @info: atom card_info pointer
950 * @reg: IO register offset
951 *
952 * Provides an IO register accessor for the atom interpreter (r4xx+).
953 * Returns the value of the IO register.
954 */
cail_ioreg_read(struct card_info * info,uint32_t reg)955 static uint32_t cail_ioreg_read(struct card_info *info, uint32_t reg)
956 {
957 struct radeon_device *rdev = info->dev->dev_private;
958 uint32_t r;
959
960 r = RREG32_IO(reg*4);
961 return r;
962 }
963
964 /**
965 * radeon_atombios_init - init the driver info and callbacks for atombios
966 *
967 * @rdev: radeon_device pointer
968 *
969 * Initializes the driver info and register access callbacks for the
970 * ATOM interpreter (r4xx+).
971 * Returns 0 on sucess, -ENOMEM on failure.
972 * Called at driver startup.
973 */
radeon_atombios_init(struct radeon_device * rdev)974 int radeon_atombios_init(struct radeon_device *rdev)
975 {
976 struct card_info *atom_card_info =
977 kzalloc(sizeof(struct card_info), GFP_KERNEL);
978
979 if (!atom_card_info)
980 return -ENOMEM;
981
982 rdev->mode_info.atom_card_info = atom_card_info;
983 atom_card_info->dev = rdev->ddev;
984 atom_card_info->reg_read = cail_reg_read;
985 atom_card_info->reg_write = cail_reg_write;
986 /* needed for iio ops */
987 if (rdev->rio_mem) {
988 atom_card_info->ioreg_read = cail_ioreg_read;
989 atom_card_info->ioreg_write = cail_ioreg_write;
990 } else {
991 DRM_ERROR("Unable to find PCI I/O BAR; using MMIO for ATOM IIO\n");
992 atom_card_info->ioreg_read = cail_reg_read;
993 atom_card_info->ioreg_write = cail_reg_write;
994 }
995 atom_card_info->mc_read = cail_mc_read;
996 atom_card_info->mc_write = cail_mc_write;
997 atom_card_info->pll_read = cail_pll_read;
998 atom_card_info->pll_write = cail_pll_write;
999
1000 rdev->mode_info.atom_context = atom_parse(atom_card_info, rdev->bios);
1001 if (!rdev->mode_info.atom_context) {
1002 radeon_atombios_fini(rdev);
1003 return -ENOMEM;
1004 }
1005
1006 mutex_init(&rdev->mode_info.atom_context->mutex);
1007 mutex_init(&rdev->mode_info.atom_context->scratch_mutex);
1008 radeon_atom_initialize_bios_scratch_regs(rdev->ddev);
1009 atom_allocate_fb_scratch(rdev->mode_info.atom_context);
1010 return 0;
1011 }
1012
1013 /**
1014 * radeon_atombios_fini - free the driver info and callbacks for atombios
1015 *
1016 * @rdev: radeon_device pointer
1017 *
1018 * Frees the driver info and register access callbacks for the ATOM
1019 * interpreter (r4xx+).
1020 * Called at driver shutdown.
1021 */
radeon_atombios_fini(struct radeon_device * rdev)1022 void radeon_atombios_fini(struct radeon_device *rdev)
1023 {
1024 if (rdev->mode_info.atom_context) {
1025 kfree(rdev->mode_info.atom_context->scratch);
1026 }
1027 kfree(rdev->mode_info.atom_context);
1028 rdev->mode_info.atom_context = NULL;
1029 kfree(rdev->mode_info.atom_card_info);
1030 rdev->mode_info.atom_card_info = NULL;
1031 }
1032
1033 /* COMBIOS */
1034 /*
1035 * COMBIOS is the bios format prior to ATOM. It provides
1036 * command tables similar to ATOM, but doesn't have a unified
1037 * parser. See radeon_combios.c
1038 */
1039
1040 /**
1041 * radeon_combios_init - init the driver info for combios
1042 *
1043 * @rdev: radeon_device pointer
1044 *
1045 * Initializes the driver info for combios (r1xx-r3xx).
1046 * Returns 0 on sucess.
1047 * Called at driver startup.
1048 */
radeon_combios_init(struct radeon_device * rdev)1049 int radeon_combios_init(struct radeon_device *rdev)
1050 {
1051 radeon_combios_initialize_bios_scratch_regs(rdev->ddev);
1052 return 0;
1053 }
1054
1055 /**
1056 * radeon_combios_fini - free the driver info for combios
1057 *
1058 * @rdev: radeon_device pointer
1059 *
1060 * Frees the driver info for combios (r1xx-r3xx).
1061 * Called at driver shutdown.
1062 */
radeon_combios_fini(struct radeon_device * rdev)1063 void radeon_combios_fini(struct radeon_device *rdev)
1064 {
1065 }
1066
1067 /* if we get transitioned to only one device, take VGA back */
1068 /**
1069 * radeon_vga_set_decode - enable/disable vga decode
1070 *
1071 * @pdev: PCI device
1072 * @state: enable/disable vga decode
1073 *
1074 * Enable/disable vga decode (all asics).
1075 * Returns VGA resource flags.
1076 */
radeon_vga_set_decode(struct pci_dev * pdev,bool state)1077 static unsigned int radeon_vga_set_decode(struct pci_dev *pdev, bool state)
1078 {
1079 struct drm_device *dev = pci_get_drvdata(pdev);
1080 struct radeon_device *rdev = dev->dev_private;
1081 radeon_vga_set_state(rdev, state);
1082 if (state)
1083 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1084 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1085 else
1086 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1087 }
1088
1089 /**
1090 * radeon_gart_size_auto - Determine a sensible default GART size
1091 * according to ASIC family.
1092 *
1093 * @family: ASIC family name
1094 */
radeon_gart_size_auto(enum radeon_family family)1095 static int radeon_gart_size_auto(enum radeon_family family)
1096 {
1097 /* default to a larger gart size on newer asics */
1098 if (family >= CHIP_TAHITI)
1099 return 2048;
1100 else if (family >= CHIP_RV770)
1101 return 1024;
1102 else
1103 return 512;
1104 }
1105
1106 /**
1107 * radeon_check_arguments - validate module params
1108 *
1109 * @rdev: radeon_device pointer
1110 *
1111 * Validates certain module parameters and updates
1112 * the associated values used by the driver (all asics).
1113 */
radeon_check_arguments(struct radeon_device * rdev)1114 static void radeon_check_arguments(struct radeon_device *rdev)
1115 {
1116 /* vramlimit must be a power of two */
1117 if (radeon_vram_limit != 0 && !is_power_of_2(radeon_vram_limit)) {
1118 dev_warn(rdev->dev, "vram limit (%d) must be a power of 2\n",
1119 radeon_vram_limit);
1120 radeon_vram_limit = 0;
1121 }
1122
1123 if (radeon_gart_size == -1) {
1124 radeon_gart_size = radeon_gart_size_auto(rdev->family);
1125 }
1126 /* gtt size must be power of two and greater or equal to 32M */
1127 if (radeon_gart_size < 32) {
1128 dev_warn(rdev->dev, "gart size (%d) too small\n",
1129 radeon_gart_size);
1130 radeon_gart_size = radeon_gart_size_auto(rdev->family);
1131 } else if (!is_power_of_2(radeon_gart_size)) {
1132 dev_warn(rdev->dev, "gart size (%d) must be a power of 2\n",
1133 radeon_gart_size);
1134 radeon_gart_size = radeon_gart_size_auto(rdev->family);
1135 }
1136 rdev->mc.gtt_size = (uint64_t)radeon_gart_size << 20;
1137
1138 /* AGP mode can only be -1, 1, 2, 4, 8 */
1139 switch (radeon_agpmode) {
1140 case -1:
1141 case 0:
1142 case 1:
1143 case 2:
1144 case 4:
1145 case 8:
1146 break;
1147 default:
1148 dev_warn(rdev->dev, "invalid AGP mode %d (valid mode: "
1149 "-1, 0, 1, 2, 4, 8)\n", radeon_agpmode);
1150 radeon_agpmode = 0;
1151 break;
1152 }
1153
1154 if (!is_power_of_2(radeon_vm_size)) {
1155 dev_warn(rdev->dev, "VM size (%d) must be a power of 2\n",
1156 radeon_vm_size);
1157 radeon_vm_size = 4;
1158 }
1159
1160 if (radeon_vm_size < 1) {
1161 dev_warn(rdev->dev, "VM size (%d) too small, min is 1GB\n",
1162 radeon_vm_size);
1163 radeon_vm_size = 4;
1164 }
1165
1166 /*
1167 * Max GPUVM size for Cayman, SI and CI are 40 bits.
1168 */
1169 if (radeon_vm_size > 1024) {
1170 dev_warn(rdev->dev, "VM size (%d) too large, max is 1TB\n",
1171 radeon_vm_size);
1172 radeon_vm_size = 4;
1173 }
1174
1175 /* defines number of bits in page table versus page directory,
1176 * a page is 4KB so we have 12 bits offset, minimum 9 bits in the
1177 * page table and the remaining bits are in the page directory */
1178 if (radeon_vm_block_size == -1) {
1179
1180 /* Total bits covered by PD + PTs */
1181 unsigned bits = ilog2(radeon_vm_size) + 18;
1182
1183 /* Make sure the PD is 4K in size up to 8GB address space.
1184 Above that split equal between PD and PTs */
1185 if (radeon_vm_size <= 8)
1186 radeon_vm_block_size = bits - 9;
1187 else
1188 radeon_vm_block_size = (bits + 3) / 2;
1189
1190 } else if (radeon_vm_block_size < 9) {
1191 dev_warn(rdev->dev, "VM page table size (%d) too small\n",
1192 radeon_vm_block_size);
1193 radeon_vm_block_size = 9;
1194 }
1195
1196 if (radeon_vm_block_size > 24 ||
1197 (radeon_vm_size * 1024) < (1ull << radeon_vm_block_size)) {
1198 dev_warn(rdev->dev, "VM page table size (%d) too large\n",
1199 radeon_vm_block_size);
1200 radeon_vm_block_size = 9;
1201 }
1202 }
1203
1204 /**
1205 * radeon_switcheroo_set_state - set switcheroo state
1206 *
1207 * @pdev: pci dev pointer
1208 * @state: vga_switcheroo state
1209 *
1210 * Callback for the switcheroo driver. Suspends or resumes the
1211 * the asics before or after it is powered up using ACPI methods.
1212 */
radeon_switcheroo_set_state(struct pci_dev * pdev,enum vga_switcheroo_state state)1213 static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1214 {
1215 struct drm_device *dev = pci_get_drvdata(pdev);
1216
1217 if (radeon_is_px(dev) && state == VGA_SWITCHEROO_OFF)
1218 return;
1219
1220 if (state == VGA_SWITCHEROO_ON) {
1221 pr_info("radeon: switched on\n");
1222 /* don't suspend or resume card normally */
1223 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1224
1225 radeon_resume_kms(dev, true, true);
1226
1227 dev->switch_power_state = DRM_SWITCH_POWER_ON;
1228 drm_kms_helper_poll_enable(dev);
1229 } else {
1230 pr_info("radeon: switched off\n");
1231 drm_kms_helper_poll_disable(dev);
1232 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1233 radeon_suspend_kms(dev, true, true, false);
1234 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
1235 }
1236 }
1237
1238 /**
1239 * radeon_switcheroo_can_switch - see if switcheroo state can change
1240 *
1241 * @pdev: pci dev pointer
1242 *
1243 * Callback for the switcheroo driver. Check of the switcheroo
1244 * state can be changed.
1245 * Returns true if the state can be changed, false if not.
1246 */
radeon_switcheroo_can_switch(struct pci_dev * pdev)1247 static bool radeon_switcheroo_can_switch(struct pci_dev *pdev)
1248 {
1249 struct drm_device *dev = pci_get_drvdata(pdev);
1250
1251 /*
1252 * FIXME: open_count is protected by drm_global_mutex but that would lead to
1253 * locking inversion with the driver load path. And the access here is
1254 * completely racy anyway. So don't bother with locking for now.
1255 */
1256 return atomic_read(&dev->open_count) == 0;
1257 }
1258
1259 static const struct vga_switcheroo_client_ops radeon_switcheroo_ops = {
1260 .set_gpu_state = radeon_switcheroo_set_state,
1261 .reprobe = NULL,
1262 .can_switch = radeon_switcheroo_can_switch,
1263 };
1264
1265 /**
1266 * radeon_device_init - initialize the driver
1267 *
1268 * @rdev: radeon_device pointer
1269 * @ddev: drm dev pointer
1270 * @pdev: pci dev pointer
1271 * @flags: driver flags
1272 *
1273 * Initializes the driver info and hw (all asics).
1274 * Returns 0 for success or an error on failure.
1275 * Called at driver startup.
1276 */
radeon_device_init(struct radeon_device * rdev,struct drm_device * ddev,struct pci_dev * pdev,uint32_t flags)1277 int radeon_device_init(struct radeon_device *rdev,
1278 struct drm_device *ddev,
1279 struct pci_dev *pdev,
1280 uint32_t flags)
1281 {
1282 int r, i;
1283 int dma_bits;
1284 bool runtime = false;
1285
1286 rdev->shutdown = false;
1287 rdev->dev = &pdev->dev;
1288 rdev->ddev = ddev;
1289 rdev->pdev = pdev;
1290 rdev->flags = flags;
1291 rdev->family = flags & RADEON_FAMILY_MASK;
1292 rdev->is_atom_bios = false;
1293 rdev->usec_timeout = RADEON_MAX_USEC_TIMEOUT;
1294 rdev->mc.gtt_size = 512 * 1024 * 1024;
1295 rdev->accel_working = false;
1296 /* set up ring ids */
1297 for (i = 0; i < RADEON_NUM_RINGS; i++) {
1298 rdev->ring[i].idx = i;
1299 }
1300 rdev->fence_context = dma_fence_context_alloc(RADEON_NUM_RINGS);
1301
1302 DRM_INFO("initializing kernel modesetting (%s 0x%04X:0x%04X 0x%04X:0x%04X 0x%02X).\n",
1303 radeon_family_name[rdev->family], pdev->vendor, pdev->device,
1304 pdev->subsystem_vendor, pdev->subsystem_device, pdev->revision);
1305
1306 /* mutex initialization are all done here so we
1307 * can recall function without having locking issues */
1308 mutex_init(&rdev->ring_lock);
1309 mutex_init(&rdev->dc_hw_i2c_mutex);
1310 atomic_set(&rdev->ih.lock, 0);
1311 mutex_init(&rdev->gem.mutex);
1312 mutex_init(&rdev->pm.mutex);
1313 mutex_init(&rdev->gpu_clock_mutex);
1314 mutex_init(&rdev->srbm_mutex);
1315 init_rwsem(&rdev->pm.mclk_lock);
1316 init_rwsem(&rdev->exclusive_lock);
1317 init_waitqueue_head(&rdev->irq.vblank_queue);
1318 r = radeon_gem_init(rdev);
1319 if (r)
1320 return r;
1321
1322 radeon_check_arguments(rdev);
1323 /* Adjust VM size here.
1324 * Max GPUVM size for cayman+ is 40 bits.
1325 */
1326 rdev->vm_manager.max_pfn = radeon_vm_size << 18;
1327
1328 /* Set asic functions */
1329 r = radeon_asic_init(rdev);
1330 if (r)
1331 return r;
1332
1333 /* all of the newer IGP chips have an internal gart
1334 * However some rs4xx report as AGP, so remove that here.
1335 */
1336 if ((rdev->family >= CHIP_RS400) &&
1337 (rdev->flags & RADEON_IS_IGP)) {
1338 rdev->flags &= ~RADEON_IS_AGP;
1339 }
1340
1341 if (rdev->flags & RADEON_IS_AGP && radeon_agpmode == -1) {
1342 radeon_agp_disable(rdev);
1343 }
1344
1345 /* Set the internal MC address mask
1346 * This is the max address of the GPU's
1347 * internal address space.
1348 */
1349 if (rdev->family >= CHIP_CAYMAN)
1350 rdev->mc.mc_mask = 0xffffffffffULL; /* 40 bit MC */
1351 else if (rdev->family >= CHIP_CEDAR)
1352 rdev->mc.mc_mask = 0xfffffffffULL; /* 36 bit MC */
1353 else
1354 rdev->mc.mc_mask = 0xffffffffULL; /* 32 bit MC */
1355
1356 /* set DMA mask.
1357 * PCIE - can handle 40-bits.
1358 * IGP - can handle 40-bits
1359 * AGP - generally dma32 is safest
1360 * PCI - dma32 for legacy pci gart, 40 bits on newer asics
1361 */
1362 dma_bits = 40;
1363 if (rdev->flags & RADEON_IS_AGP)
1364 dma_bits = 32;
1365 if ((rdev->flags & RADEON_IS_PCI) &&
1366 (rdev->family <= CHIP_RS740))
1367 dma_bits = 32;
1368 #ifdef CONFIG_PPC64
1369 if (rdev->family == CHIP_CEDAR)
1370 dma_bits = 32;
1371 #endif
1372
1373 r = dma_set_mask_and_coherent(&rdev->pdev->dev, DMA_BIT_MASK(dma_bits));
1374 if (r) {
1375 pr_warn("radeon: No suitable DMA available\n");
1376 return r;
1377 }
1378 rdev->need_swiotlb = drm_need_swiotlb(dma_bits);
1379
1380 /* Registers mapping */
1381 /* TODO: block userspace mapping of io register */
1382 spin_lock_init(&rdev->mmio_idx_lock);
1383 spin_lock_init(&rdev->smc_idx_lock);
1384 spin_lock_init(&rdev->pll_idx_lock);
1385 spin_lock_init(&rdev->mc_idx_lock);
1386 spin_lock_init(&rdev->pcie_idx_lock);
1387 spin_lock_init(&rdev->pciep_idx_lock);
1388 spin_lock_init(&rdev->pif_idx_lock);
1389 spin_lock_init(&rdev->cg_idx_lock);
1390 spin_lock_init(&rdev->uvd_idx_lock);
1391 spin_lock_init(&rdev->rcu_idx_lock);
1392 spin_lock_init(&rdev->didt_idx_lock);
1393 spin_lock_init(&rdev->end_idx_lock);
1394 if (rdev->family >= CHIP_BONAIRE) {
1395 rdev->rmmio_base = pci_resource_start(rdev->pdev, 5);
1396 rdev->rmmio_size = pci_resource_len(rdev->pdev, 5);
1397 } else {
1398 rdev->rmmio_base = pci_resource_start(rdev->pdev, 2);
1399 rdev->rmmio_size = pci_resource_len(rdev->pdev, 2);
1400 }
1401 rdev->rmmio = ioremap(rdev->rmmio_base, rdev->rmmio_size);
1402 if (rdev->rmmio == NULL)
1403 return -ENOMEM;
1404
1405 /* doorbell bar mapping */
1406 if (rdev->family >= CHIP_BONAIRE)
1407 radeon_doorbell_init(rdev);
1408
1409 /* io port mapping */
1410 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
1411 if (pci_resource_flags(rdev->pdev, i) & IORESOURCE_IO) {
1412 rdev->rio_mem_size = pci_resource_len(rdev->pdev, i);
1413 rdev->rio_mem = pci_iomap(rdev->pdev, i, rdev->rio_mem_size);
1414 break;
1415 }
1416 }
1417 if (rdev->rio_mem == NULL)
1418 DRM_ERROR("Unable to find PCI I/O BAR\n");
1419
1420 if (rdev->flags & RADEON_IS_PX)
1421 radeon_device_handle_px_quirks(rdev);
1422
1423 /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1424 /* this will fail for cards that aren't VGA class devices, just
1425 * ignore it */
1426 vga_client_register(rdev->pdev, radeon_vga_set_decode);
1427
1428 if (rdev->flags & RADEON_IS_PX)
1429 runtime = true;
1430 if (!pci_is_thunderbolt_attached(rdev->pdev))
1431 vga_switcheroo_register_client(rdev->pdev,
1432 &radeon_switcheroo_ops, runtime);
1433 if (runtime)
1434 vga_switcheroo_init_domain_pm_ops(rdev->dev, &rdev->vga_pm_domain);
1435
1436 r = radeon_init(rdev);
1437 if (r)
1438 goto failed;
1439
1440 radeon_gem_debugfs_init(rdev);
1441
1442 if (rdev->flags & RADEON_IS_AGP && !rdev->accel_working) {
1443 /* Acceleration not working on AGP card try again
1444 * with fallback to PCI or PCIE GART
1445 */
1446 radeon_asic_reset(rdev);
1447 radeon_fini(rdev);
1448 radeon_agp_disable(rdev);
1449 r = radeon_init(rdev);
1450 if (r)
1451 goto failed;
1452 }
1453
1454 r = radeon_ib_ring_tests(rdev);
1455 if (r)
1456 DRM_ERROR("ib ring test failed (%d).\n", r);
1457
1458 /*
1459 * Turks/Thames GPU will freeze whole laptop if DPM is not restarted
1460 * after the CP ring have chew one packet at least. Hence here we stop
1461 * and restart DPM after the radeon_ib_ring_tests().
1462 */
1463 if (rdev->pm.dpm_enabled &&
1464 (rdev->pm.pm_method == PM_METHOD_DPM) &&
1465 (rdev->family == CHIP_TURKS) &&
1466 (rdev->flags & RADEON_IS_MOBILITY)) {
1467 mutex_lock(&rdev->pm.mutex);
1468 radeon_dpm_disable(rdev);
1469 radeon_dpm_enable(rdev);
1470 mutex_unlock(&rdev->pm.mutex);
1471 }
1472
1473 if ((radeon_testing & 1)) {
1474 if (rdev->accel_working)
1475 radeon_test_moves(rdev);
1476 else
1477 DRM_INFO("radeon: acceleration disabled, skipping move tests\n");
1478 }
1479 if ((radeon_testing & 2)) {
1480 if (rdev->accel_working)
1481 radeon_test_syncing(rdev);
1482 else
1483 DRM_INFO("radeon: acceleration disabled, skipping sync tests\n");
1484 }
1485 if (radeon_benchmarking) {
1486 if (rdev->accel_working)
1487 radeon_benchmark(rdev, radeon_benchmarking);
1488 else
1489 DRM_INFO("radeon: acceleration disabled, skipping benchmarks\n");
1490 }
1491 return 0;
1492
1493 failed:
1494 /* balance pm_runtime_get_sync() in radeon_driver_unload_kms() */
1495 if (radeon_is_px(ddev))
1496 pm_runtime_put_noidle(ddev->dev);
1497 if (runtime)
1498 vga_switcheroo_fini_domain_pm_ops(rdev->dev);
1499 return r;
1500 }
1501
1502 /**
1503 * radeon_device_fini - tear down the driver
1504 *
1505 * @rdev: radeon_device pointer
1506 *
1507 * Tear down the driver info (all asics).
1508 * Called at driver shutdown.
1509 */
radeon_device_fini(struct radeon_device * rdev)1510 void radeon_device_fini(struct radeon_device *rdev)
1511 {
1512 DRM_INFO("radeon: finishing device.\n");
1513 rdev->shutdown = true;
1514 /* evict vram memory */
1515 radeon_bo_evict_vram(rdev);
1516 radeon_fini(rdev);
1517 if (!pci_is_thunderbolt_attached(rdev->pdev))
1518 vga_switcheroo_unregister_client(rdev->pdev);
1519 if (rdev->flags & RADEON_IS_PX)
1520 vga_switcheroo_fini_domain_pm_ops(rdev->dev);
1521 vga_client_unregister(rdev->pdev);
1522 if (rdev->rio_mem)
1523 pci_iounmap(rdev->pdev, rdev->rio_mem);
1524 rdev->rio_mem = NULL;
1525 iounmap(rdev->rmmio);
1526 rdev->rmmio = NULL;
1527 if (rdev->family >= CHIP_BONAIRE)
1528 radeon_doorbell_fini(rdev);
1529 }
1530
1531
1532 /*
1533 * Suspend & resume.
1534 */
1535 /*
1536 * radeon_suspend_kms - initiate device suspend
1537 *
1538 * Puts the hw in the suspend state (all asics).
1539 * Returns 0 for success or an error on failure.
1540 * Called at driver suspend.
1541 */
radeon_suspend_kms(struct drm_device * dev,bool suspend,bool fbcon,bool freeze)1542 int radeon_suspend_kms(struct drm_device *dev, bool suspend,
1543 bool fbcon, bool freeze)
1544 {
1545 struct radeon_device *rdev;
1546 struct pci_dev *pdev;
1547 struct drm_crtc *crtc;
1548 struct drm_connector *connector;
1549 int i, r;
1550
1551 if (dev == NULL || dev->dev_private == NULL) {
1552 return -ENODEV;
1553 }
1554
1555 rdev = dev->dev_private;
1556 pdev = to_pci_dev(dev->dev);
1557
1558 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1559 return 0;
1560
1561 drm_kms_helper_poll_disable(dev);
1562
1563 drm_modeset_lock_all(dev);
1564 /* turn off display hw */
1565 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
1566 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
1567 }
1568 drm_modeset_unlock_all(dev);
1569
1570 /* unpin the front buffers and cursors */
1571 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1572 struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
1573 struct drm_framebuffer *fb = crtc->primary->fb;
1574 struct radeon_bo *robj;
1575
1576 if (radeon_crtc->cursor_bo) {
1577 struct radeon_bo *robj = gem_to_radeon_bo(radeon_crtc->cursor_bo);
1578 r = radeon_bo_reserve(robj, false);
1579 if (r == 0) {
1580 radeon_bo_unpin(robj);
1581 radeon_bo_unreserve(robj);
1582 }
1583 }
1584
1585 if (fb == NULL || fb->obj[0] == NULL) {
1586 continue;
1587 }
1588 robj = gem_to_radeon_bo(fb->obj[0]);
1589 /* don't unpin kernel fb objects */
1590 if (!radeon_fbdev_robj_is_fb(rdev, robj)) {
1591 r = radeon_bo_reserve(robj, false);
1592 if (r == 0) {
1593 radeon_bo_unpin(robj);
1594 radeon_bo_unreserve(robj);
1595 }
1596 }
1597 }
1598 /* evict vram memory */
1599 radeon_bo_evict_vram(rdev);
1600
1601 /* wait for gpu to finish processing current batch */
1602 for (i = 0; i < RADEON_NUM_RINGS; i++) {
1603 r = radeon_fence_wait_empty(rdev, i);
1604 if (r) {
1605 /* delay GPU reset to resume */
1606 radeon_fence_driver_force_completion(rdev, i);
1607 } else {
1608 /* finish executing delayed work */
1609 flush_delayed_work(&rdev->fence_drv[i].lockup_work);
1610 }
1611 }
1612
1613 radeon_save_bios_scratch_regs(rdev);
1614
1615 radeon_suspend(rdev);
1616 radeon_hpd_fini(rdev);
1617 /* evict remaining vram memory
1618 * This second call to evict vram is to evict the gart page table
1619 * using the CPU.
1620 */
1621 radeon_bo_evict_vram(rdev);
1622
1623 radeon_agp_suspend(rdev);
1624
1625 pci_save_state(pdev);
1626 if (freeze && rdev->family >= CHIP_CEDAR && !(rdev->flags & RADEON_IS_IGP)) {
1627 rdev->asic->asic_reset(rdev, true);
1628 pci_restore_state(pdev);
1629 } else if (suspend) {
1630 /* Shut down the device */
1631 pci_disable_device(pdev);
1632 pci_set_power_state(pdev, PCI_D3hot);
1633 }
1634
1635 if (fbcon) {
1636 console_lock();
1637 radeon_fbdev_set_suspend(rdev, 1);
1638 console_unlock();
1639 }
1640 return 0;
1641 }
1642
1643 /*
1644 * radeon_resume_kms - initiate device resume
1645 *
1646 * Bring the hw back to operating state (all asics).
1647 * Returns 0 for success or an error on failure.
1648 * Called at driver resume.
1649 */
radeon_resume_kms(struct drm_device * dev,bool resume,bool fbcon)1650 int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
1651 {
1652 struct drm_connector *connector;
1653 struct radeon_device *rdev = dev->dev_private;
1654 struct pci_dev *pdev = to_pci_dev(dev->dev);
1655 struct drm_crtc *crtc;
1656 int r;
1657
1658 if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1659 return 0;
1660
1661 if (fbcon) {
1662 console_lock();
1663 }
1664 if (resume) {
1665 pci_set_power_state(pdev, PCI_D0);
1666 pci_restore_state(pdev);
1667 if (pci_enable_device(pdev)) {
1668 if (fbcon)
1669 console_unlock();
1670 return -1;
1671 }
1672 }
1673 /* resume AGP if in use */
1674 radeon_agp_resume(rdev);
1675 radeon_resume(rdev);
1676
1677 r = radeon_ib_ring_tests(rdev);
1678 if (r)
1679 DRM_ERROR("ib ring test failed (%d).\n", r);
1680
1681 if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) {
1682 /* do dpm late init */
1683 r = radeon_pm_late_init(rdev);
1684 if (r) {
1685 rdev->pm.dpm_enabled = false;
1686 DRM_ERROR("radeon_pm_late_init failed, disabling dpm\n");
1687 }
1688 } else {
1689 /* resume old pm late */
1690 radeon_pm_resume(rdev);
1691 }
1692
1693 radeon_restore_bios_scratch_regs(rdev);
1694
1695 /* pin cursors */
1696 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1697 struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
1698
1699 if (radeon_crtc->cursor_bo) {
1700 struct radeon_bo *robj = gem_to_radeon_bo(radeon_crtc->cursor_bo);
1701 r = radeon_bo_reserve(robj, false);
1702 if (r == 0) {
1703 /* Only 27 bit offset for legacy cursor */
1704 r = radeon_bo_pin_restricted(robj,
1705 RADEON_GEM_DOMAIN_VRAM,
1706 ASIC_IS_AVIVO(rdev) ?
1707 0 : 1 << 27,
1708 &radeon_crtc->cursor_addr);
1709 if (r != 0)
1710 DRM_ERROR("Failed to pin cursor BO (%d)\n", r);
1711 radeon_bo_unreserve(robj);
1712 }
1713 }
1714 }
1715
1716 /* init dig PHYs, disp eng pll */
1717 if (rdev->is_atom_bios) {
1718 radeon_atom_encoder_init(rdev);
1719 radeon_atom_disp_eng_pll_init(rdev);
1720 /* turn on the BL */
1721 if (rdev->mode_info.bl_encoder) {
1722 u8 bl_level = radeon_get_backlight_level(rdev,
1723 rdev->mode_info.bl_encoder);
1724 radeon_set_backlight_level(rdev, rdev->mode_info.bl_encoder,
1725 bl_level);
1726 }
1727 }
1728 /* reset hpd state */
1729 radeon_hpd_init(rdev);
1730 /* blat the mode back in */
1731 if (fbcon) {
1732 drm_helper_resume_force_mode(dev);
1733 /* turn on display hw */
1734 drm_modeset_lock_all(dev);
1735 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
1736 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
1737 }
1738 drm_modeset_unlock_all(dev);
1739 }
1740
1741 drm_kms_helper_poll_enable(dev);
1742
1743 /* set the power state here in case we are a PX system or headless */
1744 if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled)
1745 radeon_pm_compute_clocks(rdev);
1746
1747 if (fbcon) {
1748 radeon_fbdev_set_suspend(rdev, 0);
1749 console_unlock();
1750 }
1751
1752 return 0;
1753 }
1754
1755 /**
1756 * radeon_gpu_reset - reset the asic
1757 *
1758 * @rdev: radeon device pointer
1759 *
1760 * Attempt the reset the GPU if it has hung (all asics).
1761 * Returns 0 for success or an error on failure.
1762 */
radeon_gpu_reset(struct radeon_device * rdev)1763 int radeon_gpu_reset(struct radeon_device *rdev)
1764 {
1765 unsigned ring_sizes[RADEON_NUM_RINGS];
1766 uint32_t *ring_data[RADEON_NUM_RINGS];
1767
1768 bool saved = false;
1769
1770 int i, r;
1771 int resched;
1772
1773 down_write(&rdev->exclusive_lock);
1774
1775 if (!rdev->needs_reset) {
1776 up_write(&rdev->exclusive_lock);
1777 return 0;
1778 }
1779
1780 atomic_inc(&rdev->gpu_reset_counter);
1781
1782 radeon_save_bios_scratch_regs(rdev);
1783 /* block TTM */
1784 resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
1785 radeon_suspend(rdev);
1786 radeon_hpd_fini(rdev);
1787
1788 for (i = 0; i < RADEON_NUM_RINGS; ++i) {
1789 ring_sizes[i] = radeon_ring_backup(rdev, &rdev->ring[i],
1790 &ring_data[i]);
1791 if (ring_sizes[i]) {
1792 saved = true;
1793 dev_info(rdev->dev, "Saved %d dwords of commands "
1794 "on ring %d.\n", ring_sizes[i], i);
1795 }
1796 }
1797
1798 r = radeon_asic_reset(rdev);
1799 if (!r) {
1800 dev_info(rdev->dev, "GPU reset succeeded, trying to resume\n");
1801 radeon_resume(rdev);
1802 }
1803
1804 radeon_restore_bios_scratch_regs(rdev);
1805
1806 for (i = 0; i < RADEON_NUM_RINGS; ++i) {
1807 if (!r && ring_data[i]) {
1808 radeon_ring_restore(rdev, &rdev->ring[i],
1809 ring_sizes[i], ring_data[i]);
1810 } else {
1811 radeon_fence_driver_force_completion(rdev, i);
1812 kfree(ring_data[i]);
1813 }
1814 }
1815
1816 if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) {
1817 /* do dpm late init */
1818 r = radeon_pm_late_init(rdev);
1819 if (r) {
1820 rdev->pm.dpm_enabled = false;
1821 DRM_ERROR("radeon_pm_late_init failed, disabling dpm\n");
1822 }
1823 } else {
1824 /* resume old pm late */
1825 radeon_pm_resume(rdev);
1826 }
1827
1828 /* init dig PHYs, disp eng pll */
1829 if (rdev->is_atom_bios) {
1830 radeon_atom_encoder_init(rdev);
1831 radeon_atom_disp_eng_pll_init(rdev);
1832 /* turn on the BL */
1833 if (rdev->mode_info.bl_encoder) {
1834 u8 bl_level = radeon_get_backlight_level(rdev,
1835 rdev->mode_info.bl_encoder);
1836 radeon_set_backlight_level(rdev, rdev->mode_info.bl_encoder,
1837 bl_level);
1838 }
1839 }
1840 /* reset hpd state */
1841 radeon_hpd_init(rdev);
1842
1843 ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
1844
1845 rdev->in_reset = true;
1846 rdev->needs_reset = false;
1847
1848 downgrade_write(&rdev->exclusive_lock);
1849
1850 drm_helper_resume_force_mode(rdev->ddev);
1851
1852 /* set the power state here in case we are a PX system or headless */
1853 if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled)
1854 radeon_pm_compute_clocks(rdev);
1855
1856 if (!r) {
1857 r = radeon_ib_ring_tests(rdev);
1858 if (r && saved)
1859 r = -EAGAIN;
1860 } else {
1861 /* bad news, how to tell it to userspace ? */
1862 dev_info(rdev->dev, "GPU reset failed\n");
1863 }
1864
1865 rdev->needs_reset = r == -EAGAIN;
1866 rdev->in_reset = false;
1867
1868 up_read(&rdev->exclusive_lock);
1869 return r;
1870 }
1871